Safety device.



C'. F. ROOT.

SAFETY DEVICE.

APPLICATION FILED FEB. 6, 1915.

Batented Jan. 25, 1916.

3 SHEETS-SHEET I.

C. F. ROOT.

SAFETY DEVICE.

APPLICATION F|LED-FEB.6.1915.

Patented J an. 25, 1916.

3 SHEETS-SHEET 2.

NVENTOR n i @ga/VFW MW/ 'BY Wb y W1 YWESSES C. F. ROOT.

SAFETY DEVICE.

'APPLICATION FILED FB.6.1915.

Patented Jan. 25, 1916.

3 SHEETS-SHEET 3.

INI/ENTOR y CI-IAIEtIEiS F. ROOT, OF RAVENNA, OHIO, ASSIGNOR OF ONE-'FOURTH TO BYRON O. CONN, i OF MANSFIELD, OHIO.

SAFETY DEVICE.

T o all whom it may concern Be it known that I, CHARLES F. Rooi', a

vcitizen of the United States of America, re-

siding at Ravenna, in the county of Portage and State of Ohio, have invented certain new and useful Improvements in Safety Devices, of which the following is a speci-l fi'cation.'

`This invention relates to safety devices for'printing presses, though equally applicable to machines equipped with a movable lelement that is adapted to exert a pressure uponwork orthe like which is interposed i' between said element and an opposing element.v

It is well known that the operator'of a machine who is required to place work bekkor otherwise failing to remove the hands or tween and remove work from between a movable pressure element and an opposing element by hand manipulation is in great dangerof being injured by inadvertently fingers vfrom between the elements in time toV prevent the hands or fingers of the operator from being caught, pressed and crushe between said elements.

The primary object of this invention ltherefore is toprovide means of insuring absolute safety to the operator of a machine of the class described although by inadver- `tency or otherwise the operators fingers or preferably exerted upon the movable work engaging element just prior to contacting with and while it is acting uponthe work 4that is interposed or projected between the lmovable work engaging element and a resisting opposing element; and automatic means to render the movable work engaging element inoperative to exerta-pressure when in its working movement it encounters an obstruction extraneous to the work which subjects it to a pressure before it reaches the pre-determined point at which itis operative to'exert a pressure.

Another obj ect of this inventionis to provide machines of the class described with anautomatic safety device that will prevent injury to the operator irrespective of Specification of Letters Patent.

Application filed February 6, 19.15. Serial No. 6,420.

Patented Jarras, raie.

the fact as to whether or not his mind-is upon the work.

The above objects are set out in my application 'bearing date of November 2l, 1914, Serial No. 873,778 and the present invention lhas the same objects in viewand consists in the construction of new elements, arrangements thereof, and means of combining them to accomplish the objects or results above described.

A. further object is to reduce to a minimum the weight of the work engaging element and to provide facilities for resisting pressure thereon transmitting it to the face of the work engaging element and distributing it upon the whole area of the face in substantially equal proportions.

lc5 i This invention comprises a duplex work engaging element, the parts of which are linked together and a slidable locking means to automatically connect the parts to exert a pressure upon an opposing element,

said means being also automatically operable to permit one of the parts to yield with relation to Athe other upon being subjected to pressure before the parts are connected for'exerting a pressure upon the opposing element.

` A further object is to prevent the duplex work engaging element from exerting a pressure upon work interposed between it and the opposing element by means which is manipulated by hand, 'said means also being adapted to continuously or periodically prevent said work engaging element from exert-ing a pressure upon the opposing element at the will of the operator.

I attain these and other objects by the mechanism illustrated in tlieaccompanying drawing, in which:

Figure 1 isa side elevation partly in section of a conventional type of a job printing press showing the safety device applied thereto. The duplex work engaging element is shown in a position to yield, in fulllinesand rigidly connected together for ex:` erting a pressure, in dotted lines. Fig. 2 is a side elevation of the press showing the relative positions of the parts of the duplex work engaging element and operating mechanism when the duplex element has been subjected to pressure, to wit: by the fingers or hands of the operator, prior toits acting upon the work. Fig. 3 is a plan view of the' duplex work engaging element and mechag Liri-Toxin nism sho-wn separated from the press in.

locked position. IFig. 4 is asectional detail view on the line X X 1of Fig. 3 showing .v ""i Athe applicatlon of a friction spring. E o 1s a rear elevation of the press and 'safety .operating mechanism.4 Fig.. 6 is a detail -view of the method of connecting the re. bound coil4 springs. Referring to the drawings, reference nu- 4 the`crank disks'and 5 and 6thel connecting rods of an ordinary job printing press. One

l part 7 of a duplex Work engaging element is provided with legs S and 9 and pivotally mounted upon a shaft 10. The part 7 is provided lwith a'series of corrugations 11 (preferably of a rectangular shape). The

other -(or auxiliary'part) 12 of the duplex work engaging element is also pivotally mountedjupon lthe shaft 10.

The parts 7 and 12 comprising the duplex work. engaging elements are yieldingly Alinked together-for movement in unison and independent'of each other by the links 13 and `14 lwhich are provided with solts 15. A locking member` 16 is provided with a series of corrugations 17 and is s lidablysecured to the part 12 by the bolts 18 which are inserted in theslots 19 andthreadably connected to the part 12 and maintain the leaf spring 20 in -frictionalsliding contact with the part 12. The locking member 16 is provided with -standards21 and 22 .and a shaft 23 is journaled in the ends forming a yoke like 4structure. The'part 12 is provided lwith wings 24 and 25 and suitable bearings are formed i therein to journal a rocleshaft 26. Arms 27 and 28 having their ends bifurcated to movably enga e the shaft 23 are rigidly secured to the roc i shaft 26 by any Well known fastning means. A lever'- 29 having a cam 30 I formed on its free ends is rigidly secured to the rock shaft and is located and adapt-ed to travel fin the path of the nose 31 of the contact lever 32 which is pivotally mounted upon a standard 33 which is in turn secured to and supported bythe bars 34 and'3.

The contactlever is preferably made in the form of a bell crank and pivotally mounted 50,-

uponthe 'standard 33. The part '36 of the bell crank Contact lever is Weighted to normally hold the contact lever 32 in contact with the stop pin 37. The retractile springs 38 and `39 which are attached tothe arms 27 and 28 and to the part 12 normally eXert pressure to force the locking member 16 to the position shown in Fig. 1, 'dotted lines, or in other Words forcing the ends of the ridges of the corrugations 11 and 17 in a position to abut against each other.

,The springs 40 and41 are attached to the arms 27 and 28- and to a brace 42 to provide a, cushion for the rebound of the 5 locking member'. The hooked end 401 and "402 of the springs 40 and 41 are attached-to lmeral 1 depicts a frame, 2 the platen, 3 and' a lng 43 through the medium of the slot 44 which allows for play of the hooked ends of t' `Vng and prevents the tension of the "reirl being exerted upon the locking e ber for cushioning purposes until the ioclringniember has beenforced to or is ad- 'jacent to its normal positionthereby interlocking the parts of the duplex Work engaglngelement.- -1

The operation of the safety device in its applicationto a conventional type of jobbing press as shown in the drawings, is' as follows zl When movement is imparted to the ldisks 3 and 4 it is transmitted to thelinks' and 6 thence to a shaft 45 which is journaled in suitable bearings for-med in the part 12 causing the part 12 and part 7 which is linked against the ends of the ridges of the corruv gations of the ylocking member16 4(see dotted lines, Fig. 1).

has traveled to a pre-determined point in its Working stroke, the cam 30 on the lever 29, comes in contact with the nose 31 of the con- VVlien the duplex Work engaging element tact lever, the tension of the springs 38 and v 39 are counteracted and the locking member is forced to. slide to the position shown in 1, full lines, leaving the ridges of the corrugations of the locking member and the ridges of the corrugations of the part 7 in positions 4opposite the channels of the corrugations preparatory to being telescoped therewith.

If the duplex Work engaging element is subjected to pressurewhen in the above described position, or an obstruction (such as the hands or fingers lcz) vis interposed between the Work engaging. element and the opposing element, during the time that-the cam is in contact With the nose 31, the corruf gated part 7 will yield. `the corrugations of A the part 7 and corrugations of the locking member16 telescoping with each other and when the pressure is relieved or the obstruction removed,-the part 7 Will by gravity'move to the position shown in Fig. 1, full lines, thereby permitting thesprings 38 and 39 to force the locking member to slidablyT move to aposition that the ridges thereof will be in alinement With and in position to abut against ridges of the part 7 as shown in dotted lines, Fig. 1thereby rigidly interlocking theparts of the duplex Work engaging element for exerting a pressure.

The cam 30A is arranged and made of such proportions'and dimensions that it is forced4 to contact'with the nose-31 at a pre-determined point in the working movement of,

points in its Working movement -by simply varying the dimensions of the cam or arranging the cam to contact With and be rei' leased from the nose l at a pre-determined Apoint in the., Working movement ofthe du- 'i A-plex Work engaging element.

. To prvide hand manipulated means for periodically or continuously preventing the duplex Work engaging element from' exerting a pressure upon the Work interposed between both elements, a lever 46 is pivotally .attached to the frame and is connected to a bell crank 47 by a link 48. When it is desired to continuously'or periodically prevent the Work engaging element from exerting a pressure, the lever 46 isV operated to throvs7 the crank lever to the position shown in dotted lines, the end 49 will then .contact with leg 8 and exert a pressure therecn'thereby preventing' the parts from being interlocked.

The iiand manipulated "mechanism can beused to perform the functions of vvhat is called a"throw off in the printing press art.

What is claimed. is: Y l. The combinationwith a duplex Work performing element and its actuating means, of

normally collapsible connections between `the parts of the duplex element including a sliding' member operable to permit said parts to collapse, and means wherebyl said member is operatedduring the operative movement of the duplex Work-performing element and just prior to the engagement of said element With the ivork and when the path of.

l the element is free to render said connections rigid against collapsing.

2. The combination with a -duplex Work performing element and its actuating means, of normally collapsible connections between the parts of the duplex element comprising' i a vsliding corrugated member operable to permit said parts` to collapse, and .means whereby said member is operated `during the operative movement of the duplex Work per'- forming element' and just prior. to the enagement of s.:- 'ad eis-.ment vvith the vWork and When the path of: time element is free to rendersaid connection. rigid against collapsing.

3. The combination with a duplex moving I element of a machine and its Iactuating means, of jnnrmallyl yieldable connections betvveexithepartsof the duplex .element dgp? u ment.

ed to yield When movementof said element` is resisted, one of the parts of vsaid duplexelement being provided with corruga'tions, said connection comprising a sliding corrugated member and means to automatically render said connection `operable to-prevent the parts of said duplex member from yielding and to permit 'said parts to yield when it v encunters resistance in 'its operative movement prior to contacting with the Work.

element of a machine and its actuating means, the duplex element' comprisingfnor- 4. The combination with a duplex'moving;

mally yieldable and relatively movable parts;

a sliding member to rigidly' conneet'fsa-id parts at a predetermined point in the v'operative movement of said duplex element, and means whereby the parts of said duplex element may move relatively to each.' other when movement of said duplex element is resisted by an extraneous obstruction Abefore said predetermined point is reached.

5. -In combination With a duplex'reciproeating member, means to actuate said duplex member, a sliding member interposed'betvveen the parts-of the duplex member, and.

automatic means to actuate said i sliding member to force it to a position 'to permit the parts of the duplex member to collapse if it meets with resistance before itf reaches a. predetermined point in its operative move- 6. In combination With a duplex re'ciproeating member, one of thel parts being provided with corrugations, a sliding corrugated member interposed between the parts ofthe lduplex member and in one position having its corrugations engageable with the corrugations of said part, automatic means to operate the sliding member to rigidly 'connect the parts of the duplex member by said-engagement of the corrugations for exerting a pressure, and automatic means to operate the sliding member to force it ina position to permit the duplex member .to yield when it encounters an obstruction before it reaches aV predetermined point in itsivorking movement. j'

7.- In combination with a duplex' movable :Work engaging element, a sliding member interposed between the yparts-of the duplex member, automatic means to force the'slidingmember in a position to interlock "the parts of the4 duplex member at a pre-determinedpoint in its Working movement, and automatic means to prevent the sliding member from interlocking the parts of ,the du-v plex member if subjected to'resistance 'before it .reaches said pre-determined point.v l v8. In combination with a duplex movable Work engaging element, a sliding member interposedsbetween the parts of the duplex member, automatic means to force the lsliding member to a position to interlock4 'the partsfofthe duplex member at a preduplex element for exerting a pressure at a determined point in its working movement,

automatic means to prevent the sliding incur ber from interlocking the parts of the du plex member if subjected to resistance before it reaches said pre-determined point, and manually operated means to periodically or continuously prevent the parts of the duplex element from interlocking on its working stroke.

9. In combination with a duplex reciprocating element to act on the work, and actuating means for said element, a sliding member interposed between the parts of the dupleX element, means to operate the sliding member tov rigidly connect the parts of the i. v.predetermined point in its working moven n I 4pressure and movement 1n unison and to ment, and means to operate the sliding mem` ber to permit the duplex element to yield if subjected to pressure before it reaches said pre-determined pressure point.

10. In combination with a duplex reciprocating member to 'act on the work, and means to actuate said member, the parts of the duplex member being connected and adapted to be moved in unison and independent 'of each other, a sliding member interposed between the parts of the duplex member, and

means to automatically operate said sliding member to rigidly interlock the parts for permit onel part to yield relative to the other upon encounteringl resistance before it is interlocked. y

11. In combination with reciprocating dupleX means to act upon work, normally inoperative means comprising a sliding member which is interposed between the parts of the duplex means to connect the parts of the duplex means and capable of being maintained inoperative by engagement of an obstruction with said duplex means during the working stroke of said duplex means, and means for rendering. said duplex means operative when the path of the element is free.

12. The' combination with a duplex reciprocating working member of a machine,

means to link the parts of the duplex work-y cating element and its actuating means, an opposing element, a safety device connected to said element comprising a sliding mem` lber which is interposed between the parts of the duplex reciprocating element, means to automatically operate the sliding member to rigidly connect the parts of the duplex`A reciprocating element` to exert a pressure upon work interposed between said elements,

and means to render'said reciprocating eley vtoward and from the other, one of said elements being made in two parts, which are connected to move in unison and independent of each other, a sliding member interposed between the parts of the 4multi-.part element, means to force the sliding member to yconnect the parts` of the multi-part element to travel in unison for exerting a pressurewanvd to permit the parts ofthe multipart element to yield if subjected to pressure before it reaches a pre-determined point in its travel.

15. In combination with a duplex work engaging element having an abutment on one of the parts thereof, means interposed between the parts and in one position contacting with the abutment and in a second,

position being movable without engaging;v

the abutment, and means to actuate the first 1 means to cause said means to engage they abutment when the path of the element to the work is free of Aany obstruction extraneous to the work.

16. In combination with a vduplex work engaging element the parts of which are normally uncoupled, means to couple said parts, and means to move the coupling means to coupling position lwhen the'path of the element to the work is free of any obstructions eXtraneous-to the work.

17. In combination with a divided reciprocating work engaging element the divisions of which are normally disconnected, and means for positively connecting the division so as to cause same to move in unison when the path of the 4element to the work is free of any obstructions extraneous to the work.

In testimony whereof I aflix my' signature in .presence of two witnesses.

v CHARLES F. ROOT.

Witnesses:

JOHN H. Coss,

PEARL M. YUNCHER. 

